High-plasticity rapidly-degradable Mg-Li-Gd-Ni alloy and preparation method thereof

A rapid degradation and high plasticity technology, applied in the field of metal material processing, can solve the problems of complex magnesium alloy composition, high production cost, poor elongation, etc., and achieve the effect of easy operation and regulation, easy acquisition, and reduced production cost.

Pending Publication Date: 2022-04-29
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, the main purpose of the present invention is to provide a kind of high plasticity fast degradable Mg-Li-Gd-Ni alloy, aims to solve the technical problem that the production cost that existing magnesium alloy composition is complex causes is high, and its elongation rate is not good

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  • High-plasticity rapidly-degradable Mg-Li-Gd-Ni alloy and preparation method thereof
  • High-plasticity rapidly-degradable Mg-Li-Gd-Ni alloy and preparation method thereof
  • High-plasticity rapidly-degradable Mg-Li-Gd-Ni alloy and preparation method thereof

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preparation example Construction

[0045] In the preparation method of the present invention, wherein in step C), the extrusion molding conditions are: the extrusion ratio is (28-50): 1, the extrusion speed is 1-3m / min; the extrusion temperature is 200-300°C , to ensure the complete recrystallization of β-Li; if the extrusion temperature is lower than 200°C, the extrusion ratio is lower than 28, and the extrusion speed is lower than 1m / min, the matrix is ​​not completely recrystallized, and the plasticity is low; if the extrusion If the temperature is higher than 300°C, the extrusion ratio is higher than 50, and the extrusion speed is higher than 3m / min, the surface of the extruded alloy will have burrs, blackening, surface delithiation and other defects.

[0046] The ratios of elements in the alloys in this application and the various process technical parameters in the preparation method are found through experiments and are optimal, because they allow you to obtain the claimed comprehensive technical results....

Embodiment 1

[0048] A kind of high plasticity rapid degradation Mg-Li-Gd-Ni alloy, by mass percentage, its chemical element composition comprises: Gd 6.0%, Ni 0.5%, Li 8%, the rest is Mg and unavoidable impurity, described impurity The total content is less than or equal to 0.3%.

[0049] The present invention also provides a kind of preparation method of high plasticity rapid degradation Mg-Li-Gd-Ni alloy, comprising the following steps:

[0050] 1) Pretreatment: Grinding the surface of industrial pure magnesium ingots, magnesium-lithium master alloys, magnesium-gadolinium master alloys and magnesium-nickel master alloys to remove the oxide layer on the surface, and place them in industrial alcohol in turn, then place them in an ultrasonic cleaner medium cleaning;

[0051] 2) Put the pretreated pure magnesium ingot, magnesium-lithium master alloy, magnesium-gadolinium master alloy and magnesium-nickel master alloy into the crucible according to the ratio of the above-mentioned mass fract...

Embodiment 2

[0056] A kind of high plasticity rapid degradation Mg-Li-Gd-Ni alloy, by mass percentage, its chemical element composition comprises: Gd 6.0%, Ni 1.0%, Li 8%, the rest is Mg and unavoidable impurity, described impurity The total content is less than or equal to 0.3%.

[0057] The present invention also provides a kind of preparation method of high plasticity rapid degradation Mg-Li-Gd-Ni alloy, comprising the following steps:

[0058] 1) Pretreatment: Grinding the surface of industrial pure magnesium ingots, magnesium-lithium master alloys, magnesium-gadolinium master alloys and magnesium-nickel master alloys to remove the oxide layer on the surface, and place them in industrial alcohol in turn, then place them in an ultrasonic cleaner medium cleaning;

[0059] 2) Put the pretreated pure magnesium ingot, magnesium-lithium master alloy, magnesium-gadolinium master alloy and magnesium-nickel master alloy into the crucible according to the ratio of the above-mentioned mass fract...

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Abstract

The invention discloses a high-plasticity rapidly-degraded Mg-Li-Gd-Ni alloy which comprises the following chemical elements in percentage by mass: 1.0-10.0% of Gd, 0.2-2.0% of Ni, 5.5-10% of Li and the balance of Mg and inevitable impurities, and the total content of the impurities is less than or equal to 0.3%. The invention further discloses a preparation method of the Mg-Li-Gd-Ni alloy with high plasticity and capable of being rapidly degraded. According to the high-plasticity rapidly-degraded Mg-Li-Gd-Ni alloy provided by the invention, beta-Li of a BCC structure with more slippage systems is introduced into alpha-Mg, so that an alpha-Mg + beta-Li dual-phase matrix structure is constructed, and the plasticity of the alloy is improved; then a certain amount of Gd element is added into the Mg-Li alloy, the texture is weakened, and non-basal plane slippage is promoted; the plasticity of the alloy is improved by compounding a beta-Li phase with good plasticity and a plurality of plasticizing methods for generating LPSO toughness and the like; and moreover, a high-potential Ni-LPSO-containing phase is introduced, a large potential difference is formed between the Ni-LPSO-containing phase and alpha-Mg and beta-Li, galvanic corrosion is accelerated, and the degradation performance of the alloy is improved.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a highly plastic and rapidly degradable Mg-Li-Gd-Ni alloy and a preparation method thereof. Background technique [0002] In recent years, foreign unconventional shale gas exploration and development technologies have made breakthroughs, and oil and gas production has grown rapidly, which has had a major impact on the international natural gas market and the world's energy structure. The world's major resource countries have increased their efforts in shale gas exploration and development. . In the development of unconventional oil and gas reservoirs, fracturing is an important measure to increase single well production. The key components in fracturing technology are fracturing tools, including fracturing balls, bridge plugs and sliding sleeves. The traditional bridge plug needs to be drilled out after fracturing, which is time-consuming and labor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C23/06C22C1/03C22F1/06
CPCC22C23/00C22C23/06C22C1/03C22F1/06C22C1/02C22C23/02
Inventor 王敬丰任杰马凯代朝能
Owner CHONGQING UNIV
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